"The Leaning Tower illusion using a photo of a Shinkansen (Japanese bullet) train"

The two trains appear to diverge, though the two photos are identical.

Copyright Akiyoshi Kitaoka 2013 (October 21)

"The Leaning Tower illusion using a photo of a Shinkansen (Japanese
bullet) train 2"

The two trains appear to diverge, though the two photos are identical.

Copyright Akiyoshi Kitaoka 2013 (October 22)

"The Leaning Tower illusion using a photo of a Shinkansen (Japanese
bullet) train 3"

The three trains appear to diverge, though the three photos are identical.

Copyright Akiyoshi Kitaoka 2013 (October 22)

This looks like an autostereogram, but it's not.

A real autostereogram

Copyright Akiyoshi Kitaoka 2013 (October 22)

"The Leaning Tower illusion using a photo of a Keihintohoku-line train"

The two trains appear to diverge, though the two photos are identical.

Copyright Akiyoshi Kitaoka 2013 (October 21)

"The Leaning Tower illusion using a photo of a Shinkansen (Japanese
bullet) train 4"

The two trains appear to diverge, though the two photos are identical.

Copyright Akiyoshi Kitaoka 2013 (October 22)

"The Leaning Tower illusion using James"

The left James appears to tilt to the back as compared to the right James,
though the two images are identical.

Copyright Akiyoshi Kitaoka 2013 (August 3)

"The Leaning Tower illusion using a photo of the Kanmon-kyo Bridge"

The bridge in the right photo appears to head more rightward than that
in the left one, though the two photos are identical. So does the shadow
on the strait.

Copyright Akiyoshi Kitaoka 2012 (November 30)

"Roads toward Mt. Hiei"

The three lines of broken line segments are parallel to each other but they appear to diverge toward the mountain.

Copyright Akiyoshi Kitaoka 2012 (November 30)

"Roads toward Narutaki"

The three line segments are parallel to each other but they appear to diverge
toward the mountain.

Copyright Akiyoshi Kitaoka 2012 (November 30)

"Misaligned parking"

The left car is the exact copy of the right original and placed in parallel, but it appears to swing the tail outside.

Copyright Akiyoshi Kitaoka 2012 (December 4)

"The Leaning Tower illusion using a photo of the Kamigamo Shrine"

The rectangular part is a copy of the area just above and is pasted downwars
in parallel to the original. Each pair of edges of a road is parallel but
appears to diverge.

Copyright Akiyoshi Kitaoka 2012 (March 11)

Only duplication is enough, but this method takes space.

"The Leaning Tower illusion: 3D"

Two trapezoids in each frame are the same
shape and size and aligned in parallel, but the right one appears to be tilted
more clockwise than the left one (Leaning Tower illusion). This effect is
enhanced by binocular stereopsis in that the upper (shorter) side appears to be
farther than the lower (longer) side. On the other hand, this effect is
decreased by binocular stereopsis in that the upper (shorter) side appears to be
nearer than the lower (longer) side.

Copyright Akiyoshi Kitaoka 2010 (December 18)

"Reversible Leaning Tower illusion"

In the top row, the two identical cylinders appear to diverge toward upper-right. In the middle row, the two identical cylinders appear to diverge toward lower-left. In the bottom row, the apparent direction depends on the orientation of the reversible images.

Copyright Akiyoshi Kitaoka 2008 (September 29)

"Ninna-ji temple tower"

The left tower appears to tilt counterclockwise more largely than the right
one, though they are the same picture. This tower is not leaning, actually.

This picture contains at least three illusions. (1) The left staircase
appears to head slightly leftward, the middle one appears to go in the
middle direction, while the right staircase appears to head slightly rightward.
This illusion is a variant of the Leaning Tower illusion (Kingdom et al., 2007). (2) In each staircase, lower steps appear to tilt leftward while the
upper ones rightward. This illusion is called the skewed staircase illusion by S. Tsuinashi. (3) Each staircase appears to ascend, though this effect
is weak.